Method for preparing Ti2AlC ceramic material at low temperature

A ceramic material and low-temperature technology, applied in the field of preparation of ternary layered ceramic materials, can solve the problems of unfavorable production of AlC ceramic materials, high sintering temperature, expensive equipment, etc., and achieve the effect of short preparation time, high purity and easy operation

Active Publication Date: 2016-01-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above preparation methods can prepare higher purity Ti 2 AlC ceramic materials, but there are many disadvantages such as expensive equipment

Method used

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  • Method for preparing Ti2AlC ceramic material at low temperature
  • Method for preparing Ti2AlC ceramic material at low temperature

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Use Ti powder, Al powder and TiC powder as raw materials, weigh them according to their molar ratio of 1.00:1.00:1.00, then put the mixed powder into a ball mill jar, use alcohol as the ball mill medium, Ball milling for 4 hours at a ratio of 4:1 and a rotational speed of 400 rpm, and vacuum-dry the ground powder at 60°C for 2 hours to obtain a uniformly mixed powder;

[0021] Step 2: Put the mixed powder prepared in Step 1 into a stainless steel mold with an inner diameter of 10 mm, and cold press it into a round block with a thickness of 2 mm under a uniaxial pressure of 200 MPa;

[0022] Step 3: Put the pre-pressed block obtained in Step 2 into an air furnace at a temperature of 850°C for thermal explosion reaction, keep it warm for 1 minute, take it out of the air furnace, cool it to room temperature, and grind off the oxide layer on its surface ;

[0023] Step 4: Break the block obtained in Step 3 and ball mill it into powder by dry milling. The ball-to-ma...

Embodiment 2

[0025] Step 1: Use Ti powder, Al powder and TiC powder as raw materials, weigh them according to their molar ratio of 1.05:1.10:1.00, then put the mixed powder into a ball mill jar, use alcohol as the ball mill medium, Ball milling for 4 hours at a ratio of 4:1 and a rotational speed of 400 rpm, and vacuum-dry the milled powder at 60°C for 6 hours to obtain a uniformly mixed powder;

[0026] Step 2: Put the mixed powder prepared in Step 1 into a stainless steel mold with an inner diameter of 10 mm, and cold press it into a round block with a thickness of 8 mm under a uniaxial pressure of 500 MPa;

[0027] Step 3: Put the pre-pressed block obtained in Step 2 into an air furnace at a temperature of 780°C for thermal explosion reaction, take it out of the air furnace after keeping it warm for 5 minutes, and grind off the oxide layer on the surface after cooling to room temperature ;

[0028] Step 4: Break the block obtained in Step 3 and ball mill it into powder by dry milling. ...

Embodiment 3

[0030] Step 1: Use Ti powder, Al powder and TiC powder as raw materials, weigh them according to their molar ratio of 1.25:1.30:1.00, then put the mixed powder into a ball mill jar, use alcohol as the ball mill medium, Ball milling for 4 hours at a ratio of 4:1 and a rotational speed of 400 rpm, and vacuum-dry the milled powder at 60°C for 4 hours to obtain a uniformly mixed powder;

[0031] Step 2: Put the mixed powder obtained in Step 1 into a stainless steel mold with an inner diameter of 10 mm, and cold press it into a round block with a thickness of 4 mm under a uniaxial pressure of 50 MPa;

[0032] Step 3: Put the pre-pressed block obtained in Step 2 into an air furnace at a temperature of 700°C for thermal explosion reaction, keep it warm for 2 minutes, take it out of the air furnace, cool it to room temperature, and grind off the oxide layer on its surface ;

[0033] Step 4: Break the block obtained in Step 3 and ball mill it into powder by dry milling. The ball-to-ma...

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Abstract

A method for preparing Ti2AlC ceramic material at the low temperature comprises steps as follows: Ti powder, Al powder and TiC powder are selected as raw materials, firstly, the raw materials are subjected to ball milling and mixing in a certain mole ratio and then are pressed to form blocks, the pre-pressed blocks are put in an air furnace to be subjected to a thermal explosion reaction, the reacted block samples are taken out and cooled to the room temperature, oxidation layers on surfaces of the samples are rubbed off, the block samples without the oxidation layers are broken and subjected to ball milling, powder is obtained, and the high-purity Ti2AlC ceramic material can be obtained after acid treatment, washing and drying. The prepared Ti2AlC ceramic material has stable technological parameters, the method is suitable for large-scale production of the Ti2AlC ceramic material, and the method has the characteristics that the process is simple, the synthesis temperature is low, the preparation time is short and the purity is high.

Description

technical field [0001] The invention relates to a preparation method of a ternary layered ceramic material, in particular to a low-temperature preparation of Ti 2 AlC ceramic material method. Background technique [0002] With the rapid development of the economy and the acceleration of industrialization, the requirements for materials in all walks of life, especially in high-temperature structural fields such as machinery, aerospace, and energy, are also increasing. Ti 2 As a typical representative of the 211 phase of ternary layered ceramic materials, AlC has both the properties of metal and ceramics, such as good thermal and electrical conductivity, low Vickers hardness, high toughness, high elastic modulus, high melting point, and excellent Thermal shock resistance, high yield strength, plasticity at high temperature, high thermal stability, good oxidation resistance, high temperature resistance, corrosion resistance, friction and wear resistance, etc., have broad appl...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/65
Inventor 刘毅张梨梨李莹欣郭守武
Owner SHAANXI UNIV OF SCI & TECH
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